Carl grxnzweig



UNITED STATES PATENT y, OFFICE.

' CARL GRI INZW'EIG, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, ASSIGNO R TO GRI INZWEIG & HARTMANN, OF SAME PLACE.

BUILDING-BLOCK.

SPECIFICATION forming part of Letters Patent No. 482,890, dated September 20, 1892. Application filed August 7, 1891. Serial No. 401,981. (Specimens) To all whom it may concern: terial, which property is particularly impor- Be it known that I, CARL GRUNZWEIG, a tant when this material is used in high temsubject of the King of Bavaria, residing at peratures as a bad conductor of heat. Cork Ludwigshafen-on-the-Rhine, in the Kingdom combines as little as wood with mortar or 5 of Bavaria, German Empire, have invented other plastering materials. With respect to new anduseful Improvements in Buildingthe latter the new material has the same bc- Blocks, of which the following is a specificahavior as bricks or stones for building, so that. tion. it can be employed quite in the same manner It is well known that from oils, fats, gu n1- asthe said building materials and very often IO resins, &c.-2'. e., from bodies which are inadvantageously replace-the same on account soluble in waterh grinding and mixing the of its high degree of resistance to compressive same with mucilaginous binding agentsand breaking strain, its low weight, and its such as gum, sugar, yelk of eggs, or milky mixproperty of being a bad conductor of heat. turesso-calledemulsions can be obtained, In carrying out my invention I proceed as 15 in which microscopically finely-divided small follows: One part of clay is mixed with four fatpellets are maintained in suspension. The parts of water to form a uniform pulp. To 6 behavior of tar in this respect is similar to this is added one-half part of tar, and-this that of oils, fats, &c. In lieu of organic mumixture is stirred until the tar has disap cilaginous binding agents finely ground in peared and ablue-white milky aqueous emul- 20 water, c'lay may also be used for producing sionisobtained; Of thisemulsion fort-yparts the emulsion. Emulsions obtained by these are added to two hundred and twenty parts means offer, moreover, still the advantage to of small cork chips, or the above-mentioned form, after drying at a temperature as high substances are employed in similar proporas possible, (increased up to 160 centigrade,) tions The product is molded and dried ata 25 for the purpose of expellingthe volatile forhigh temperature, so that the volatile parti eign associates, solid and at the same time elascles of the tar are evaporated with the water. tic masses. Owing to their capability of re- The resultant mass will consist of clay that sisting liquids, emulsions are particularly fit has absorbed within its pores the finely-difor serving as binding agents, in particular vided solid particles of the tar, and this con- 30 for vegetable bodies. An emulsion made of stitutes the peculiar feature of my improved tar and clay, forinstance, is an excellent bindbinding mass by means ofwhich the small ing agent for cork. By means of small quancork pieces are united, so as to form a solid tities of such emulsion small cork pieces may simplerbody. c be united to a plastic mass, which after havhat I claim isy 3 5 ing been thoroughly dried at a temperature The method of manufacturing blocks,which of 160 centigrade forms a mass in many reconsists in forming an aqueous solution of spects similar to the natural cork, but supeclay and tar to constitute a pulp, stirring th rior to the latter in numerous applications. same to form a milky blue-white emulsion, The product is tough and elastic like cork, adding cork chips,and moldingand drying the 0 and it has the properties of the latter viz., of product to cause an evaporation. of the volaserving as a bad conductor of heat. The size tile components of the tar, substantially as of the blocks or pieces to be formed is unlimspecified. ited, and planks of any optional length and In testimony whereof I have signed my thickness may be made therefrom,which after name tothis specification in the presence of 45 drying are capable of being worked like wood, two subscribingwitnesses.

while cork can be obtained only in pieces of CARL GRI INZWEIG. determined size. In addition to this cork is WVitnesses: 1 hygroscopic and shrinks in the heat, which is C. MESSER,

not the case with the artificially-obtained maq R. H. GROPP. J 

